Java
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Java implementation of MySQL database operation based on JDBC
This paper describes the method of operating MySQL database based on JDBC in Java. Share with you for your reference, …… -
On the difference between spring singleton bean and singleton pattern
The difference between spring singleton bean and singleton pattern is that their associated environment is different. …… -
Java socket programming heartbeat package creation instance analysis
1. What is a heartbeat pack? Heartbeat packet is a self-defined command word that regularly notifies the other party o…… -
Java batch files are compressed, exported and downloaded to the local sample code
It mainly uses org apache. tools. zip. Zipoutputstream is a zip stream. Here, take EXECL as an example. Idea: first wr…… -
Java socket programming server response client instance code
The client information is read through the input stream, and the corresponding time is realized through the output str…… -
Detailed explanation of basic concepts of Java language annotation
1、RetentionPolicy. Source: the annotation is only kept in the source file. When the java file is compiled into a clas…… -
Simple instance of spring IOC and scope attribute resolution of bean
IOC (inversion if control) - inversion of control is one of the two core technologies of spring. IOC is generally divi…… -
Code details of Apache commons Toolset
Apache commons contains many open source tools to solve the problems often encountered in programming and reduce repet…… -
Detailed explanation of spring automatic assembly and scanning annotation code
1 @ r of JavaBean_ 404_ 1860@ Automatic injection to reduce the configuration information of XML files. 2 spring scan …… -
Explain how spring boot admin uses Eureka monitoring service
preface I'm just free recently. Let's learn how to build a spring boot admin environment. Many pits were encountered. …… -
Code analysis of spring interceptor handlerinterceptor interface
Spring's handlermapping supports interceptors. Interceptors must implement the handlerinterceptor interface, which con…… -
Java dynamic proxy (design pattern) code explanation
Foundation: need to have the idea of object-oriented design, polymorphism and reflection; With the emergence of Java d…… -
On the application of custom annotation in spring
1. Java custom annotations and spring As a kind of metadata information of program elements (classes, member variables…… -
[spring boot] a method to quickly build a spring boot micro framework
Spring boot is a framework for quickly building an environment. Its design concept is to reduce XML configuration as m…… -
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How to use hashcode and equals in Java
preface As we all know, Java Lang. object has a hashcode () and an equals () method, which play an important role in s…… -
Brief introduction to Linux network I / O model (picture and text)
1. Introduction The Linux kernel treats all external devices as a file (everything is a file). Reading and writing to …… -
Spring integrates the implementation of quartz job and spring task
There are two main types of timed tasks commonly used in spring 1. Spring integrates quartz job 2. Tasks built in afte…… -
A brief introduction to spring annotations
The core components of spring MVC Dispatcher servlet - C > controller, request entry handermapping - controller, re…… -
Java implementation of output loop number (spiral matrix) method example
This paper describes the method of outputting loop number (spiral matrix) in Java. Share with you for your reference, …… -
Java gets the information instance code of the current operating system
There are several mainstream methods. One is to use the following function publicstaticStringgetProperty(Stringkey) On…… -
On the role of thread communication, wait and notify
The purpose of thread communication is to enable threads to send signals to each other. In addition, thread communicat…… -
Spring uses oxm for object XML Mapping parsing
1. Understanding XML parsing technology 1.1 XML related concepts (1) DTD: XML syntax rule, which is the verification m…… -
Java learning simple chat example code using TCP
TCP TCP protocol is a connection oriented transport layer protocol that ensures high reliability (no data loss, no dat…… -
Example explanation of Lucene’s implementation of index and query
0 Introduction With the development of the world wide web and the advent of the era of big data, a large amount of dig…… -
Java IO stream reads pictures for foreground display code sharing
Recently, the project needs to use the IO stream to read pictures to provide foreground page display. In the past, the…… -
Code analysis of XOR in Java
There is an XOR operator in the bit operators of Java, which is represented by the symbol (^). Its operation rule is: …… -
Java basics essay
1. Basic concepts IO is the process of copying data from main memory and external devices (hard disk, terminal, networ…… -
Analysis of the reason why JavaWeb dbutils cannot find the content when executing SQL commands and traversing the result set
The reason why JavaWeb dbutils cannot find the content when executing SQL command and traversing the result set and th…… -
Java recursive algorithm traversal department code example
Recursion is a very useful knowledge point. Write some examples to help you remember There is process code in the midd…… -
Spring security custom authentication login process record
Spring security usage categories: I believe Baidu knows how to use spring security. There are four kinds of usage, fro…… -
Javacv uses ffmpeg to play audio and video synchronously
Recently, the ffmpegframegrabber frame catcher of the ffmpeg package of javacv played the captured audio frames and vi……